基于灰度聚集度的图像变化检测

引入既能反映点的数目,又能反映点的分布状况的指标-聚集度,讨论了有关性质,给出了利用聚集度进行图像变化检测的方法．将标准图像与待检测的图像二值化,以差图像中“1”和“-1”的聚集度的最大者判断图像是否发生变化．通过理论分析和实际检测,表明用聚集度进行图像变化检测,不需要对待检测图像进行预处理,可以有效地克服图像噪声干扰带来的影响。

Varied image detection based on gathering degree

A new concept of gathering degree is proposed which represents the number of abnormal points and represents the distribution of the points either.About gathering degree,some properties are discussed,some conclusions are proved,and the detecting method of varied image is advanced.The gathering degree of "1" and "-1" in the subtraction image between two-valued standard image and two-valued varied image is used as detection index.The theoretical analysis and the practical detection show clearly that the method is able to eliminate the influence of images noise effectively.